911 Carrera 4 Cabriolet (997) F6-3.6L (2006)
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PCCB brake discs without surface fractures
No replacement necessary!
2. Friction area surfaces after a long run and occasional higher load. Isolated surface fractures smaller than 1 cm2 -arrow-.
PCCB surface fractures
No replacement necessary as the associated surface fractures are < 1 cm2!
3. End of service life of friction area surface or after highest load on a racing circuit.
PCCB friction surface damage
Replace brake discs if there is associated friction surface damage > 1 cm2 -arrow-. To do this, please observe the relevant information ->
Replacing brake discs (notes/decision-making aid).
Evaluating surface roughness (Sr) (max. 80 micrometer permitted)
Information
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An increase in surface roughness impairs smoothness of braking (rubbing, shaking in steering wheel, scraping noises) and increases brake pad
wear.
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With a roughness (Sr) value of > 80 microns (> 80 micrometer), a precautionary parts replacement is required.
The assessment is carried out visually, based on the diagram. Two illustrations of the same peak-to valley surface roughness (views 1 and 2) help to
make a better assessment.
1. Brake discs that are OK:
